Apple has released the Thunderbolt Software Update for Lion via their Software Update Utility and website for direct download. According to the company, this update provides support for the Apple Thunderbolt Display and bug fixes for Thunderbolt device compatibility. More information about the Thunderbolt Display itself can be found here. The Thunderbolt Software Update weighs in at 60.30MB and requires Mac OS X 10.7.1 or later.

[Update:] 09/20/2011 - Apple has released the Thunderbolt Software Update for Snow Leopard. According to the company, this update also provides support for the Apple Thunderbolt Display and bug fixes for Thunderbolt device compatibility.